Historical Results
Based on (1) saved test runs, The test labeled "=== null" was (on average) the faster by 0.0066 seconds, (1.375% faster)
The === null test took 0.4709 seconds.
The == null test took 0.4775 seconds.
Nitty-Gritty
Each test case ran 20 random code order iterations consisting of 132,888 loops for a total of 2,657,760 runs.
- Line execution difference (0.000002) milliseconds.
- Avg difference (0.000) milliseconds per 132,888 loops.
- Total difference 6.57 milliseconds for 2,657,760 loops
The iteration variablity for Code 1 was (0.0000) milliseconds and Code 2 was (0.0000) milliseconds. The lower and the closer together there values are the more accurate the results are.
Code
The first test, "=== null", was:
for ($j = 0; $j < 100; $j++)
{
$GLOBALS['dummy3'] = $GLOBALS['dummy1'] === null;
$GLOBALS['dummy3'] += $GLOBALS['dummy2'] === null;
}
The second test, "== null", was:
for ($j = 0; $j < 100; $j++)
{
$GLOBALS['dummy3'] = $GLOBALS['dummy1'] == null;
$GLOBALS['dummy3'] += $GLOBALS['dummy2'] == null;
}